arm: imx: make various struct sys_timer static

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c
index f17a15f..1dfe3c7 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -580,7 +580,7 @@
 	mx31_clocks_init(26000000);
 }
 
-struct sys_timer mx31moboard_timer = {
+static struct sys_timer mx31moboard_timer = {
 	.init	= mx31moboard_timer_init,
 };